Rear-end structure for rear-dump stokers



May 31,1927.

R.'L. BEERS REAR END STRUCTUREFOR REAR DUMB swokms Filed June 16', 1922 'fa gjs riits-sheet 1 v I lizz/e rzzi jiqqceLfiee-zv &

May 31, 1927. 1, 30,464

I R. L. BEERS REAR END STRUCTURE FOR REAR DUMP s'roKERs Filed June 16. 1922 .3 Sheet-Sheet 2 2 73 E 11:: .12: 11".". :22.

fiQyce I. 56 em.

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- 1,630,464" May 31,1927. RLL' BEERS REAR END STRUCTURE FOR REAR DUMP STOKEYHS Filed June l6.' 1922 3 Sheets-Sheet 3 as ed, may 31, 1927. v

ROYCE L. :BIEERS, or? ,nrrrnorm, MIEfHIGAN; Assrerqont Y iir'nsun nssmlrivmmrs} To 1 RILEY STOKERCORPORATION, 0F WORCESTER; lvrAssAcnusritrirs; 1A, CORPORATION: d

, OFJIMASSACHUSETTS.

i1tBale-131w'1) nemi s FOR sna 151135115 fSjToKERS a V In 't'lie construction of lu'nderfeed 'fstokers of the rear-dump type, and particularly the multiple-retort stokers ofthis type,'tl1efstru'c-' ture andarrangementoftherearend:ofthe. V 5 fire-box'fioor upon-Which,normally,liye'fuel is being carried, -niust' ,1 neetexacting require 'nientsj and itiisto the provision of a simple,

efficient, fdurable'rearend structure that my invention is primarily addressed. r

I In an undrfeed stoker wh combustion to an ash pit. beyond the end. of

the non-dumping portion of' the "firefljo'x' floor, 1 particularities of construction of the of the stokelnf Across this rear end area the "t'uelhas burned down so that thefu e'l mass handledby the rear end structure is apt'to'loe in a state of 'very active combustion, with e 'e n its ash constituents'in a"liighly jheatd Y. sw m that the rear end istructure is sub- 'jected to trying Conditions of'use Further, its construttion has to" do both with the tune-j tions of fuel-retardation, efi'ecting perform? ance along the entire longitudinalline offthe' retorts, and with 'thefunotion of delivery fo' fash or of partly consumed j fuel to "the dumping area back of 'suclrrear-e ldr,

'A uong the further "objects; of my 'inven'- tion, aimed to meet the severe demands upon this portion or thestoker construction, are thefproyision of sectional structures, with the sections in such fl-mutually etfective units that f deterioration may be very slow,- but that d I hood of the body-end [17 preferably slight-l forwardof the flange; {The zretoiitibodies replacement of burned out. units may be easily and inexpensively made; also'toj p'ro- VlClG structural units ofadyantageous' con-- struction and interwelation froln the stand of the stolierentityg haviiiusuaea a single eiribodiment of m rein the fuel 1 impelled longitudinally along 'tlie v 'parallel I retorts WlllCli have their tuyerle bordered margins or n'iouths down-sloping toward the rear, foriiltiin'ate delivery of the'refuse of the front 41 a, {ends ofLt-he "retorts' fThe parallel retorts are spanned by tuyere structures 1 extreme "retorts series 'liaving j their outer fwalls surmounted f. by? suitable ituyere structures. 12" extending to.

ture typified;liyfbeam 18; and.the rear enf structure to :be" described may find supnort I point of manufacture andQinitialfinstalla 100" F tion; also to provide for cooperation off the rear end structure with the. retort loody and t'uyere elements separating adjoining retorti bodies, for most advantageous functioning 1nventlon n uts preferred forn tor-purposes '1' of full di clo ure, although itlwillbefunder- I stood that inanychanges fin details of con-{ 11 struction and arrangement. may. be made 1' Without clepa-rturel fro n "the spiri of irn'y in} ventiomwithinthe scope-of" theelaiins that are hereto appended.

, Insaid"draiivings,Fig.1visasectionalyiew.'

oni line' 1' "1 of'cli ig." 2 with parts in elevation, showing sectionally the ridge portion oft-he rear end structure of a "Stoker in associatioliwithifraginentary portions of known retort] elementsyduniping meansl and fuel-disftribu ,t lon means; F1' ..2'1s-a p1an vlew of parts'lof the stoker1sl1otvn fin Fig, I'J;Fig; -3- is an en- 7 larged View era rearend'bottoinj'plate andj associa'te parts; 4t: is'a planyiewotthe f plateelement 'of'Figf' and Fig. "5 is-a sec ies or known construc tiongext'ending in'p arallellsm. to 'rece1v e fuel from feed rains, not sliown,uof usual provis on, arranged beyond rearwardly down-sloping margins illof these na'ceisidewalll3. 'Each fretort{loodyyf v partlcu'lar construction illustrated, ma hay a horizontal bottom portion 14, over; \yhichf Works adistributor orpusher.blockl55ranr;, actuated n'known fash on, and-fthe horizonfital bottom portion may merge fintoan 5-: sloping body-fend IG'terminatingiin' a flange 17',With' which-the rear-end."structure tobe' described may coat-ti 1 The min tuyeres. 1:2 5; I d o and 12 preferablyierniinate in the neigb or-I may be positioned'on afsuitabl'e fran'i'est' betwe'eii' jthe flanged endsof the 7 retort b o die.

and suitable-franie' nember such as the transverse beam 1 9; yvhich-xwith its founilav tion ZQYm'ay'formip art of partition ylvall dividing 5 an air chamber filnunderlyi i fh' non-dumping i {structure of the firebox ll! from fanfash-pit 22 which" -r inderlies' 'the ;a'sopacity, and along its top surface smalltuyere,

openings 7 8 formed by notches in the meet- I ing edges of the sections, and along its line of juncture with the floor plates, shallow tuyeres 7 4. At its front end each section of the ridge structure may be'provided with a lug 75 to hook over the angle-iron 25; to

assist in retaining the structure against longitudinal displacement. v

As to an extreme retort of abattery pro vided in a furnace, only asingle section-of ridge-structure needbe employed, as indicated at 31in Fig. 2, this beingsupplemented by deadplates 80, and the side tuycooling of this hard-used area of the com-7 ere structure 12" of. the retort may be pro-V vided with a corner block 81 of suitable de-. sign to rest on the parts 31' and 80,-these detail features being not pertinent to my present invention. j

- It will be notedthatthe rear end structures of alternating longitudinal zones provided by the bottom plate structures; 30

andthe ridge structures 31, form a substantial continuation of the retort arrangement, in effect on fuel guidance and distribution, with the crested form of the upper surface of the bottom structurefaiding' in holding back the fuel against too-sudden delivery to the ash-pit, and With, the steeply clowncurved-rear portion of the bottom surface buition chamber floor. With the construction shown the air in passage to the tuyere openings from thewind chamber 21 con-c tacts w th large-cooling surfaces provided by the webs which'run longitudinally as to the bottom structure and transversely as to the rib structure; andin the bottom structure he circulation is additionally directed, and

cooling assured by the provision of the baf fie-fins 60. Further it will be notedthat should a portion of the bottom of the rear end burn. out, having its marginal wall melted along the crest portion, the closely (iii spaced, heavy vertical webs will still carry the fire witho'utfthe creation of large holes 1 andwithoutdumping the fire into the wind-z The speci-' fied mounting ofthe plates of the bottom: end sections of the ridges, in locked seourchamber to any serious extent.

ity at their front edges, but in flat sliding contact with the head 19 o f frame'beam' 19 tends to prevent warping, distortion or displacement of the structure unit, for the rear end structure may expand and contract without restraint at the point ofbearing on frame 19, and theentire rear endstruc'ture can move as required' by expansionof the retort body. I a V It will be understood thatwhile I have herein described in considerable detail a specific embodiment of my invention, 'some' refinements of which Imay claim for their specific advantage, my invention in its broader'aspects is not restricted to the precise details shown and many changes may be made therein without departure from the spirit of'my invention within the scope of the appendedclaims. 7 1 l l'claimz" f 1. The combination of a "Stoker-retort, having at its rear end provision to interlock with hereinafter specified plates; a support-:-

ing member in-rearof'and below therear I end of saidretort; and spanning between and supported in position by. saidsupport and the rear end of said-retort, a sectional rear end structure comprising a plurality.

of'relatively narrow longand deep vertical plates arranged sidebby side and extending lengthwise of the retort structureand inter iocking with its rear-end, each such, plate having a web portion with amarginal head atits top and its rear end, said heads contacti ng to hold the webs in spaced relation and jointly forming atop surface in sub- 1 f stantialfcontinuation of the bottom of the retort and forming also a generally 1110- right, substantially closed rear endextending downto said supporting member.

- 2. The combination "of a plurality of I Stoker-retort bodies, arrangedside by side and spaced apart, tuyere structures between said iretortbo'dles, and a rear endstructure comprising bottom portions aligning with If theretOrt-bod1es and ridge portions align-.1

ing with the intervening tuyere structures,"

saidridge portions fitting between and laterally spacing the'bottomportionsand said i a bottom portions beingcomposed each of a" plurality of narrow plate-sections arranged on edge,side by side, and lengthwise of the retorts, with their topsurfaces jointly form inga substantial continuationof the bottom of the retort and their rear surfaces jointly forming a substantially-closed generally upright end. I I p "3; The combination of a plurality of stoker-retort bodies, arranged side by side and spaced apart;;tuyerestructu-res between 1' said retort bodies; and-a rear end structure comprising bottom "portions, aligning with the retort bodies and ridge portions aligningi with the intervening tuyere "structures, said ridge portions fitting between and laterallyspacing the bottom portions,'and said bottom l 7 portions being composed each ofa plurality of narrow plate-sections arranged on edge, side by side and lengthwise of there 7 a tort, with-theirjtop surfaces jointly.- form ing a substantial continuationof the bottom of'the retort and their rear surfaces jointly forming a substantially-closed generallyupright end, the several sections of said bottom portions being identical in structure and each comprising a deep narrow web or body portion and a broader shallow'head portion, said head portions contacting to maintain the body portions separated and with hereinafter specifiedplates, a support- I ing member in rear of and below the rear end of said retort; and spann ng between and supported in position by saidsupport and the rear'end of said retort, a sectional rear-end structure comprising a plurality of relatively narrow, longand deep vertical plates arranged side; by side andlextending lengthwise of theretort-structure. and illterlocking with its rear-end, each such plate having a web portion with a marginal head at its top and its rear end, said heads contacting to hold the webs inspaced I'BlELtlOIl and jointly forming atop surface in sub 'stantial continuation of the bottom of-the retort but, in. a -earward direction, up-sloping from therear end of the retort to an intermediate crest and then dowirsloping,

and said heads also jointly forming a rear surface which is substantially closed and slopes forwardly and downwardly from the line of juncture with the, topsurface to said supporting member.

5. The combination of a plurality of-retorts arranged side by side andspaced apart and each-havinga body with a down-slop ng V margin,.tuyere structures bGlDWGGHiLdjOlIllIlg retorts, and a rear-end structure comprising bottom portions aligning with the retorts and: ridge portions aligning with theinterve ning tuyeres, supporting means in rear of the retorts for supportingfrombelow the rear end of thebottom portions, each said bottom portion comprising a plurality of: plates of relatively deep narrow construe tion arranged. on-edge, said plates having provision, for interlocking with the rear eX- treinities of the retorts, and said ridge por-.

tions comprising bodies rising higher than the bottom portions and:resting on the ex treine ones of adjacent groups of bottom platesa nd. having side walls eXtending .be--- the rear surface vof ,said Web, saidparts providing a top-portion having a crest between the front and rear ends of the strucr' ture and down-slopingfrom said crestinf both, said. directionsbut more steeply in a I tween said plates on which it rests.-

' 6. The coinbinationwvith a stoker retort.

having ,a tuyere bordered down-sloping margin, and a; bot-tom between the tuyerebordered sides of. theretort, of a rear end structure providing-fa: bottom portion longitudinally. aligning with the bottom of v the 1 retort, andv comp rising aplurality of narrow 1 deep. plate sections arranged-on edge with the forwardportions of theirtop surfaces forming a substantial continuation of the; retort-bottom, each, said plate 1 section comprising a deep vertical web and a shallow marginal headfor contact with the. head :o-f'

web,.said fins on adjoining pl-atesbeing sinu 1 ilarly positioned jointly to form a battle;

p 7. The combination of a stoker retort hav ing at its rear end} provision for. platerengagement, a support back [of said. retort,

and a sectionalirear end structurefcompris-i nig a plurality of vertically disposedplates said heads being arranged for lateral abutment one against another to. form the-s upper each having a web anda marginal head,

surface of the rear end structureand space I said webs V apart, the forward; portionsof. said plates having provision for interlocking engagement with-,theprovision on the retort-ends, and having on, their heads provision for interlocking. the plates one with another. 7 r r n v 8. A rear-end. plate for coaction; with-duplicate plates to form a rear end bottom:

structure for an underfeed stoker, compris ing a relatively deep vertical web, a relatively'shallow marginal head bordering the top surface of the, web, complemental pros v sion at opposite lateral faces of the heads for interlocking the heads together, and provision at the front end of the plate.for'lock-,

ing it to-a' retort;

9; A'iiearend plate for coaction with dupl-icate platesto form a" rear-end bottomstructure foran under-feed stoker: and hav-u ing at its front end provision for coaction. r

with a retort, comprising a relatively deep 'verticalweb, a relatively shallow marginal head bordering theutop surface of the web,

inn

laterally-extending fin structures '-0n opposite sides of the web below the marginal head: at the top of the web, said fins ex- V tendinglaterally to the planes vof the two respective sides. of the head,- for the purpose described.

10. A rear-end plate for coaction with duplicate'cplates to form a rear-end bottomstructure for an underfeed stoker and having at its frontend provision for coaction with a retort, comprising a relatively deep vertical web, and a relativelyshall'ow marginal head bordering the top surface and rearward direction, andv the rear portions of saidheadand web extending downwardly from their line of juncture with the top surfaceto an extent greater thanthe'height of said crest, the topportion only of said head having marginal edge notches therein to-form tuyeres- I i J 11. A rear-end plate for coaction with driplicate plates to form a rear-end bottomstructure for an under-feed Stoker and hav- .ing its front end shaped for coaotion with a retort, comprising a relatively deep ver- 1 tical Web and a marginal head which is relatively shallow and borders Onbothsides t thereof the top and-rear portions ofthe Web to provide the top and rearsurfaces of the plate, said top-surfacehaving a crest nearerits forward end than its rearend and downsloping fronrsaidcrestjin both saiddireo-T tlons but more steeply 1n rearward three tion, and the rear surfaceof said plate slop- 1 .ing forwardly and downwardly from its line of juncture with thetop surface, and said top surface only having marginal edge: notchesto fo r rn tuyeres. V V 12. A rear-end plate for coaction with duplicate plates to form a rear end bottom-- structure for an underfeed s'toker and having its front end shaped toprovide for co I action with a retort,'c0mprising a relatively deep vertical Web, a relatively shallow 'rnan" V ginal head bordering the top and rear porcornplemental provisions at" opposite lateral faces of said head-forinterlockingthe heads together said head being of uniform lateral protrusion from 'the'jWeb throiighout its portions'of the wehon both sides thereof, and I tion-at'the' rearenol of the Web and having ed ge-notehes to form; tuyeres. 13. A

in itsportion a he p of the Webl ter'a'l rear-endplate for ;eoaction withduplicate platesto formqa rear-end bottom-1;

structure for an nnderfeedjstoker, comp'ris,'

mg; ayrelatively "deep -verticali Web, a rela: v I j 'ti'vely shallow marginal head bordering the?v a 1 a top and rear end of the Web, and extending laterally from both sides thereof andhaving V provision at oppositela'teral faces tor intr-l lookingadjoining' heads-together;and'saidweb' fhaving provision at its front end for;

looking it to a retort;andinarrow finson] if I saidQWeb extending "rea'rW'ardlyandidownifif \vardly'along opposite sides of the Webbeneath the front portion'ffof said head; substantially as andfor the purpose described;

ornet. ems; i 

